mirror of
https://github.com/No-Chicken/Power-Pico.git
synced 2026-04-03 13:02:36 +08:00
93 lines
1.6 KiB
C
93 lines
1.6 KiB
C
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#include "delay.h"
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#include "sys.h"
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/*
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//roughly delay
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void delay_us(u32 nus)
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{
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u32 i;
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u16 temp;
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temp = nus*SYS_CLK/15;
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for(i=0;i<temp;i++);
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}
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//<2F><>ʱnms
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//nms:Ҫ<><D2AA>ʱ<EFBFBD><CAB1>ms<6D><73>
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void delay_ms(u16 nms)
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{
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u32 i;
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for(i=0;i<nms;i++) delay_us(1000);
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}
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*/
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void delay_init(void)
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{
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HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
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/* Configure the SysTick to have interrupt in 1ms time basis*/
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HAL_SYSTICK_Config(SystemCoreClock / (1000U / uwTickFreq));
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}
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#if OS_SUPPORT
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void delay_us(u32 nus)
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{
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u32 ticks;
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u32 told,tnow,tcnt=0;
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u32 reload=SysTick->LOAD;
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ticks=nus*SYS_CLK;
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delay_osschedlock();
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told=SysTick->VAL;
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while(1)
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{
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tnow=SysTick->VAL;
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if(tnow!=told)
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{
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if(tnow<told)tcnt+=told-tnow;//<2F><><EFBFBD><EFBFBD>ע<EFBFBD><D7A2>һ<EFBFBD><D2BB>SYSTICK<43><4B>һ<EFBFBD><D2BB><EFBFBD>ݼ<EFBFBD><DDBC>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϳ<EFBFBD><CDBF><EFBFBD><EFBFBD><EFBFBD>.
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else tcnt+=reload-tnow+told;
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told=tnow;
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if(tcnt>=ticks)break;
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}
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};
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delay_osschedunlock();
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}
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void delay_ms(u16 nms)
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{
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if(delay_osrunning&&delay_osintnesting==0)
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{
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if(nms>=fac_ms)
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{
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delay_ostimedly(nms/fac_ms);
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}
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nms%=fac_ms;
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}
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delay_us((u32)(nms*1000));
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}
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#else
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void delay_us(u32 nus)
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{
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u32 ticks;
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u32 told,tnow,tcnt=0;
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u32 reload=SysTick->LOAD;
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ticks=nus*SYS_CLK;
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told=SysTick->VAL;
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while(1)
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{
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tnow=SysTick->VAL;
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if(tnow!=told)
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{
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if(tnow<told)tcnt+=told-tnow;
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else tcnt+=reload-tnow+told;
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told=tnow;
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if(tcnt>=ticks)break;
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}
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}
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}
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void delay_ms(u16 nms)
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{
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u32 i;
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for(i=0;i<nms;i++) delay_us(1000);
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}
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#endif
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